Bernard Whalen, a lieutenant in the New York Police Department, has published two books: The NYPD's First Fifty Years and Justifiable Homicide.
Philip Messing is a long-time police reporter for the New York Post.
Robert Mladinich is a retired detective for the NYPD, where he was named Cop of the Year in 1985. He written a number of true crime books, including From the Mouth of the Monster: The Joel Rifkin Story, as well as articles for magazines including Playboy and Details. He is also the writer/editor for Frontline, a publication of the NYC Sergeants Benevolent Association.